Car-truck bolster.



PATENTBD DEC. 19, N305.

W. C MILLER.

CAR TRUCK BOLSTBR. APPLICATION FILED PBB.24.1904.

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miga?! UNITED STATES PATENT FFICE.

WILLIAM C. MILLER, OF GRANITE CITY, ILLINOIS.

CAR-TRUCK BoLsTER.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application filed February 24, 1.904. Serial No. 194,993.

useful Improvement in Car-Truck Bolsters, of

which the following is a full, clear, and exact description,such as will enable others skilled in the art to which it appertains to make and use the same. reference being had to the accompanying drawings, forming part of this speciiication, in which- Figure 1 is a top plan view of a bolster constructed in accordance with my invention. Fig. 2 is a side elevational View of the bolster, one spring-seat thereof being shown in section; and Figs. 3, 4, 5, and 6 are cross-sectional views on the lines 3 3, 4 4, 5 5, and 6 6, respectively, of Fig. 1.

This invention relates to car-truck bolsters; and one of the objects of the invention is to provide a bolster which can be constructed of a single casting capable of sustaining the weight of the car and resisting any strains to which it would be subjected.

As illustrated in the drawings, the bolster consists of a centrally-disposed web 1, carrying the center bearing 2, the side bearings 3 and 4, and the spring-seats 5 and 6. The web is provided with a recess 7 for the reception of the ordinary king-bolt, and this recess terminates between the top and bottom of the web, so as to leave the lower portion thereof unobstructed throughout its length. A transverse opening 8 is formed in the recess 7, through which a suitable fastening devicecan be inserted to secure the king-bolt in place. The integral compression member 9 is provided with depending flanges 10 and 11, which extend from spring-seat to spring-seat, said flanges being wider at their middle than at their ends. The bottom of the web consists of an elongated tapered ilange 12, the bottom edges of said ange converging toward the ends and top of the bolster. Said converging edges terminate adjacent the projections 13, which form the column-guides. By reference to Figs. -1 and 2 it will be observed that this elongated flange 12 is of uniform width throughout, the side portions on either side of the web adjacent to the spring-seatsk imparting considerable strength to the completed structure. The portions 14, it will be noticed, are in the form of outwardly-projecting flanges, which extend in a lateral plane. Theange 12 is of various depths, the greatest depth being at the center or beneath the center bearing 2, the depths gradually decreasing toward the spring-seats. The respective ends of the web diverge, as'at 15, to form the inner walls of the spring-seats 5 or 6, said walls being unobstructed by any braces or webs, this being unnecessary in view of the width of the portions 14, which are in the form of flanges, as illustrated in Fig. 4. By constructing a bolster in accordance with the one just described a maximum amount of strength can be obtained with a minimum weight.

I am aware that minor changes in the construction, arrangement, and combination of the several parts of my device can be made and substituted for those herein shown and described without in the least departing from the nature and principle of my invention.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is-

A bolster having spring-seats and a single longitudinally-disposed web provided with a king-bolt-receiving.recess terminating intermediate the top and bottom of the web and provided with a transverse opening for the reception of the fastening device to secure the king-bolt in position, a top plate carried bythe web and having depending iianges extending from spring-seat to spring-seat, and a tapered iiange carried at the bottom of the web; substantially as described.

In testimony whereof I hereunto aiiix my signature, in the presence of two witnesses, this 22d day of February, 1904.

WILLIAM C. MILLER.

Witnesses:

GEORGE BAKEWELL, CORA BADGER. 

